LAN83C175 Datasheet, PDF (22/92 Pages) SMSC Corporation – Ethernet CARDBUS Integrated Controller With Modem Support

to queue the header descriptor for the next
frame. After the header descriptor is queued,
the software may set RXQUEUED again to
guarantee that the header descriptor is
recognized. When the DMA is finished
copying the first frame, it will immediately read
the next descriptor and may begin copying the
next header without waiting for the software to
respond to an interrupt.
Note:
Software must never set NEXTFRAME
more than once per frame. NEXTFRAME
may only be set when the copy is in
progress or has already been completed.
Figure 4 shows an example of the Receive Buffer
Structure, and Figure 4 shows a flow diagram for
the Receive Buffering Method.
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